Drive-ring



H. W. PLEISTER.

DRIVE RING. wmcanou HLED tUNE a, 19m

1 ,33 1,524. Patented Feb. 24, 1920.

ill/ 2. 3- 4 6 E j ATTORNEY UNITED STATES PATENT OFFICE.

HENRY W. PLEISTER. OF WES'IFIELD. NEW JERSEY, ASSIGNOB TO HElTRY B. NEWHALL,

I JR., EXECUTOR OF HENRY B. NEWHALL. DECEASED.

DRIVEJ'LING.

Application filed nine 9.

To all whom it may concern.

Be it known that I, HENRY \V. Pnnis'ren, a citizen. of the l'nited States. residing at Westfield. in the county of Union and State of Xew Jersey, have invented certain new and useful Improvements in Drive-Rings, of which the following is a specification, taken in connection with the accompanying drewmg.

My invention relates to drive rings and more particularly to such a drive rin which can be made out of hard wire and which will neither crack nor break at the bend between the shank and ring. nor will the shank buckle or bend under the blows of a hammerf My invention relates also to certain details of construction all of which will be more fully hereinafter described and pointed out in the claim.

In the accompanying drawing the some reference numerals refer to similar parts in the several figures.

F igure 1 is a side elevation of my new and improved drive ring;

Fig52 is a. front elevation l'llig;.fl l1d i 3 is a side elevation similar to Fig. 1, but s owing the old form of drive ring.

Drive rings are driven into supports, the same Ias nails are driven, and support wire or any suitable object by the aid of the ring portion. These drive rings are 'usual] formed out of wire and bent sharply heel upon themselves at an angle of 180 degrees which isequivalcnt to flattening the wire on itself. This serves to strain the metal at the bend so that in hammering or driving the shank into any suitable support the drive ring will break or crack at the bend. To more clearly describe my present invention I have shown the 'old form in Fig. 3, in which 101 is the shank. 102 the ring portion and 103 the shari bend of the ring; portion upon the shanlt 101. It is at 1.03 tha it has been found in practice so many of the drive rings will crack or break in the hammering operution that they are a total loss and are returned to the manufacturer as such. Many also arc'ruined in the course of manufacture.

If the drive ring is made of a wire soft enough to stand the 180 degree bend at point 103, Fig. 3, it has been found that the shank 101 will he too soft to withstand the of my a drive hammer blows which will be delivered at the specification 0,! Letters Patent.

Paten ed Feb. 24, 1920. 1919. Serial No. 302,564.

point 103. so that the shaft will bend or buckle and will not drive as a. wire nail should drive.

Great difliculty has been encountered in manufacturin these drive rings so as to obtain a successful one, and one which. will withstand the use to which they are to be put. For example, it has been found that a. drive ring formed of hard drawn low grade wire will break. So also will standard furniture spring wire. Moreover it has been found that hard wire breaks a. great many of the shaping dies when the ring ortion is bent down sharply upon the shan t portion, as shown in Fig. 3.

By my invention I have overcome all these objections and have successfully produced a. commercial drive ring which has met all' a period of many than 180 de recs. I do this in any suitable manner pre erably by arranging the dies so as not to crowd the metal. at the bend 3. This leaves a. small eyelet 4 and removes the excessive bending strains at the bend 3 which either crack the drive ring in the course of munufactu re at this point, or place the metal. under such strains and stresses that when it is attempted to hammer the shank 1 like a nail the metal will crack or break at the point 3.

I am able to use a hard wire, such as for example hard nail wire, and bv introducing this small eyelet 4 I not only/ obtain a. suc-. cessful and commercial driv'e ring but, I. also reduce the cost of ma 'lfacture by redncinp the breckage of the xies.

hile I have mentione hard nail wire,

any wire which is sutliciengy hard to permit the shank l to be driven ate a will like a null willcome under my,-invcntion and any shape of eyelet which e'roids bending the metal 180 degrees.

Having thus described this invention in connection with an illustrative embodiment thereof, to the details of which I do 'not desire to be limited. what is claimed asnew and what is desired to secure by Letters Patent is set forth in the appended claim.

What lclnin1i nplane of the eyelet so as to permit remly A new article of lllitllllfacLtHG comprising hammering 0f the drive ring without hitting 10 a drilve ring having b: shgnk portitlm alnd the open spiral ring. 5 )iru ring portion nt aek (in he Sltlni r t t 5 p ortinn forming {m eyelet between said i HENR I LEIS'I members, said spiral rin being open and W itn'sses: wound in a planeparalle i with the axis of MARY R. RYAN, the slimlk portion and located beneath the A. M. Wunnms. 

